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A305353 Expansion of Product_{k>=1} (1 - x^phi(k)), where phi is Euler's totient function. 1
1, -2, -2, 6, -4, 2, 6, -14, 8, -2, 4, -6, -16, 38, -22, 6, 2, -10, 2, 6, 60, -126, 28, 70, -38, 6, -38, 70, -54, 38, 18, -74, -70, 214, 106, -426, 186, 54, -26, -2, -92, 186, -218, 250, -66, -118, -104, 326, 466, -1258, 500, 258, -254, 250, -368, 486, -342, 198 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..57.

FORMULA

Product_{k>=1} (1 - x^k)^A014197(k).

CROSSREFS

Cf. A000010 (phi), A014197, A120963, A280611.

Sequence in context: A138565 A137316 A064851 * A134458 A193819 A182786

Adjacent sequences:  A305350 A305351 A305352 * A305354 A305355 A305356

KEYWORD

sign

AUTHOR

Seiichi Manyama, May 31 2018

STATUS

approved

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Last modified December 15 03:48 EST 2019. Contains 329990 sequences. (Running on oeis4.)